Sohna investment: Pre-possession quality check

Okay I'll be honest — I completely underestimated how confusing this process is. Sohna mein JMS The Nation dekh raha hoon for investment. Builder ka track record check kar raha tha, but site visit pe construction quality kaise judge karein? Kya cheezein dekhni chahiye jab under-construction ho? Cracks ya finishing issues baad mein aate hain, but initial red flags kya hote hain jo resale value affect kar sakte hain? Aur maintenance charges ka kya scene hai, kya woh worth it hoti hain for the services? Yaar, ROI pe impact aata hai na in sab se.